By Herman Kruegle
This revision of the vintage publication on CCTV expertise, CCTV Surveillance, offers a entire exam of CCTV, protecting the functions of assorted platforms, find out how to layout and set up a method, and the way to decide on the fitting undefined. making an allowance for the ever-changing advances in know-how utilizing electronic suggestions and the net, CCTV Surveillance, moment variation, is totally up-to-date with the hot developments in electronic cameras and electronic recorders, distant tracking through the net, and CCTV integration with different safety platforms. carrying on with within the celebrated culture of the 1st version, the second one variation is written to function an invaluable source for the end-user in addition to the technical practitioner. every one bankruptcy starts off with an outline, and provides the newest details at the suitable apparatus, describing the features, positive factors and alertness of every machine. insurance of getting older or out of date know-how is lowered to a ancient standpoint, and 8 fresh chapters hide electronic video know-how, multiplexers, built-in camera-lens-housing, shrewdpermanent domes, and speedy deployment CCTV platforms. * Serves as an critical source on CCTV thought* comprises 8 new chapters at the use of electronic parts and different similar applied sciences that experience noticeable a up to date explosion in use * absolutely illustrated, the e-book comprises thoroughly up-to-date images and diagrams that characterize the most recent in CCTV expertise developments
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Extra resources for CCTV Surveillance, 2nd Edition 2006 Video Practices and Technology
Panoramic lenses have been available for many years but have only recently been combined with digital electronics and sophisticated mathematical transformations to take advantage of their capabilities. Figure 2-15 shows two lenses having a 360 horizontal FOV and a 90 vertical FOV. 8 FIGURE 2-14 Zoom video lens horizontal field of view (FOV) NARROW ANGLE 105 mm Video Technology Overview (A) FIGURE 2-15 29 (B) Panoramic 360 lens a donut-shaped image. 5). has been labeled a pinhole lens. Figure 2-16 shows examples of straight and right-angle pinhole lenses used with C or CS mount cameras.
Lens. Light from the illumination source reflects off the scene. The lens collects the light from the scene CONSOLE MONITORING SITE MONITOR (CRT/LCD) VIDEO CAMERA TRANSMISSION MEANS COAX CABLE COAXIAL UTP (UNSHILDED TWISTED PAIR) OPTICAL LENS VIDEO PRINTER SCENE ILLUMINATION SOURCE (NATURAL, ARTIFICIAL) FIGURE 2-1 Single camera video system VIDEO RECORDER (DVR/VCR) Video Technology Overview • • • • • and forms an image of the scene on the light-sensitive camera sensor. Camera. The camera sensor converts the visible scene formed by the lens into an electrical signal suitable for transmission to the remote monitor, recorder, and printer.
It is easier to identify a scene characteristic by a difference in color in a color scene than it is to identify it by a difference in gray scale (intensity) in a monochrome scene. For this reason the target size required to make an identification in a color scene is generally less than it is to make the same identification in a monochrome scene. 3 Effects of Motion A moving object in a video image is easier to detect, but more difficult to recognize than a stationary one provided that the camera can respond to it.